If the user modifies configuration, e.g. /etc/fstab, they might forget to tell
systemd about the changes. Let's do a reload for them.
Note that doing a reload should be safe, because emergency and rescue modes are
"single threaded" and nothing should be doing changes at the point where we are
exiting from the sushell. Also, daemon-reload can be implicitly called at
various moments, so we can ignore the case where the user did some incompatible
changes on disk and is counting on systemd never reloading and picking them up.
C.f. #7565.
This is actually slightly safer because it allows gcc to make sure that all code
paths either call return or are noreturn. But the real motivation is just to
follow the usual style and make it a bit shorter.
So far I avoided adding license headers to meson files, but they are pretty
big and important and should carry license headers like everything else.
I added my own copyright, even though other people modified those files too.
But this is mostly symbolic, so I hope that's OK.
`systemctl default` uses job mode `isolate` (see `action_table`).
The job mode option is ignored.
Note that exiting the emergency shell service by using e.g.
`systemctl isolate multi-user` or `systemctl start multi-user.target`
already kills `emergency.service`. There's only a potential conflict
between your command and the command in systemd-sulogin-shell if you run
something like `systemctl start --no-block multi-user.target; exit`.
Which is nothing like what we told them to do :).
They require a writable /tmp dir (in the bash implementation).
Let's use echo, and not 'echo -e' since that doesn't seem to be completely
portable.
Fixes#6052.
The indentation for emacs'es meson-mode is added .dir-locals.
All files are reindented automatically, using the lasest meson-mode from git.
Indentation should now be fairly consistent.
The emergency.service and rescue.service units have become rather
convoluted. We spawn multiple shells and the help text spans multiple lines
which makes the units hard to read.
Move the logic into a single shell script and call that via ExecStart.
